Control circuit (10; 10') for a at least one spring applied, fluid release type brake (11) of a trailer, the control circuit comprising a control fluid line (23; 23') providing fluid pressure to drive the brake to an applied condition, and a supplementary fluid line (22; 22') providing fluid pressure to bias the at least one said brake to an off condition. The pressure in the control fluid line is modulated by at least one control member (12, 13, 14) of the tractor and the supplementary fluid line applies a constant fluid pressure in opposition to the action of fluid pressure in the control fluid line. The control circuit includes one or more failure-safety valves (33; 33') that cause venting of fluid pressure in the supplementary fluid line thereby applying the at least one said brake when the fluid pressure in the control fluid line is below a threshold.


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    Title :

    A TRACTOR-TRAILER BRAKE CONTROL CIRCUIT


    Additional title:

    BREMSSTEUERKREIS FÜR ZUGFAHRZEUG-ANHÄNGERKOMBINATION
    CIRCUITE DE CONTRÔLE DE FREIN POUR UNE COMBINAISON TRACTEUR-REMORQUE


    Contributors:

    Publication date :

    2022-03-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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